Churn Rate Calculator
Enter customers at the start of the period and how many you lost to get churn and retention.
How to use this calculator
- 1Enter how many customers you had at the start of the period.
- 2Enter how many you lost during it.
- 3Read your churn rate and the retention rate that mirrors it.
How the Churn Rate Calculator works
Churn rate is the share of customers you lose over a period — lost customers divided by the customers you started with. It’s the leak in the bucket: even a few percent a month compounds heavily across a year, and it’s usually cheaper to reduce churn than to acquire new customers to replace the loss.
Retention rate is its mirror image (100% minus churn). For many subscription businesses, monthly churn under 3–5% is healthy. Faster onboarding, better support and the right customers in the first place all bring it down.
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Create an invoice freeFrequently asked questions
How is churn rate calculated?
Divide customers lost by customers at the start of the period, times 100. Losing 25 of 500 customers in a month is 5% monthly churn.
What is a good churn rate?
Lower is better. For many SaaS businesses, monthly churn under 3–5% is healthy; small percentages compound heavily over a year, so even a point matters.
Churn vs retention?
They are two sides of the same coin: retention rate = 100% − churn rate. Reducing churn is usually cheaper than acquiring new customers to replace the loss.
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